Share 'Sacred: Is there such a thing in atheism?'

As a ex-christian, I fully acknowledge that my language is still fully immersed in religious vocabulary. Words like 'bible' 'holy' 'sacred' 'blasphemy' 'heresy' still paint my conversations, but the problem is, I don't know what words to sub in to get across what I mean when something is considered sacred. To an atheist does that get 'downgraded' to just 'important' or 'crucial' or 'vital' …